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NCB3 Internal Gear Pumps

The NCB3 is a compact internal gear pump from the NCB series, designed for high‑viscosity fluid transfer. It features an internal meshing gear design with a crescent plate, ensuring no liquid trapping, smooth flow, low noise, and long service life. With a maximum flow of 3 m³/h, it handles liquids from light solvents to heavy oils, honey, and paints (viscosity: 0.2–100,000 cp). Widely used in petroleum, chemical, food, and coating industries.

Model:
NCB3
Brand:
Green Hydraulic
Model Number:
NCB3
Packaging Details:
Standard export carton/plywood case
Testing Before Shipment:
Yes
Cartification:
ISO9001，CE
Markets:
• Industrial • Energy • Government (Non Aerospace) • HVAC • Mobile • Natural Resources • Transportation (Non Aerospace)
Application:
1. Industrial Hydraulic Systems 2. Mobile Equipment (Industrial Vehicles) 3. Construction and Engineering Machinery 4. Metallurgy Industry
Shaft Type:
Key Shaft and Spline shaft
MOQ:
1 set


Availability:



Inquiry

Product Description

NCB3 Gear Pump Overview

The NCB3 is a reliable, fixed-displacement internal crescent gear pump engineered for high-viscosity fluid transfer in industrial systems that demand consistent flow and long service life. Featuring a compact cast iron construction, the NCB3 is specifically designed to provide smooth, low-pulsation flow with minimal noise, making it an ideal choice for food processing, chemical, petroleum, and coating applications where fluid handling precision and durability are critical.

NCB3

Features and Benefits

Robust Cast Iron Construction:
The NCB3 is built with heavy-duty cast iron bodies and covers, offering superior structural rigidity and corrosion resistance compared to lighter materials. This durable construction minimizes internal deflection under continuous duty cycles, ensuring stable performance and extended service life in demanding operating conditions.
High-Efficiency Internal Gear Design:
Utilizing an advanced crescent-style internal gear meshing system, the NCB3 eliminates fluid trapping, reducing noise and pulsation while maintaining high volumetric efficiency. This design is inherently tolerant of moderate fluid contamination and thermal shock, protecting the pump from premature wear during extended use with oils, syrups, paints, and other viscous media.
Precision-Machined Gear and Housing Components:
Equipped with precision-machined gears and tight-tolerance housings, the NCB3 maintains optimal internal clearances that minimize fluid bypass and friction. This ensures consistent mechanical efficiency and reliable flow delivery across a wide range of operating temperatures and fluid viscosities.
Wide Viscosity and Pressure Capability:
Despite its compact footprint, the NCB3 is engineered to handle fluid viscosities from light solvents to heavy oils (0.2–100,000 cp) and continuous operating pressures up to 1.0 MPa (10 bar). Its precision components allow it to deliver smooth, reliable flow for high-viscosity fluid transfer and metering tasks.
Versatile Installation and Application Flexibility:
The NCB3 series offers a range of displacements to suit flow requirements, with standard flange and port configurations for easy integration into industrial systems. With its compact design and multiple mounting options, it provides unmatched installation flexibility for space-constrained environments in chemical processing, food manufacturing, and general industrial applications.

Specifications

Model Codes

Technical Data

Parameter	Specification
Pump Type	Fixed-displacement internal crescent gear pump
Model	NCB3 (NCB-3/0.3)
Maximum Flow Rate	3 m³/h (≈ 50 L/min)
Rated Pressure	0.3 MPa (3 bar / 43 psi)
Max. Working Pressure	1.0 MPa (10 bar / 145 psi)
Speed Range	300–960 rpm (typical: 700 rpm)
Viscosity Range	0.2–100,000 cP
Fluid Temperature Range	-10°C to +120°C (standard)
Suction Vacuum	≥ 0.03 MPa
Port Size (Inlet/Outlet)	DN25 (1")
Motor Power (Typical)	1.5 kW (Y100L-6, 700 rpm)
Construction Materials	Pump body: Cast iron; Gears: Carbon steel; Seals: Buna-N / Mechanical seal optional
Shaft Sealing	Packing seal or mechanical seal (optional)
Drive Options	Direct-coupled motor, belt drive, or reducer drive
Mounting Style	Horizontal base mount
Weight (Pump Only)	≈ 25 kg
Key Features	No trapped fluid, low pulsation, low noise, high volumetric efficiency, suitable for high-viscosity media

NCB3 Hydraulic Gear Pump Installation Dimensions：

Applications

Applications

The NCB3 series provides a reliable, high-efficiency fluid transfer solution specifically tailored for industrial and process applications where high-viscosity media handling, low pulsation, and consistent performance are required:

Chemical & Petrochemical Processing:
A primary choice for transferring oils, solvents, and viscous chemicals in refineries and chemical plants, where the NCB3’s internal gear design ensures smooth, pulsation-free flow and compatibility with a wide range of process fluids.
Food & Beverage Production:
Optimized for handling syrups, honey, molasses, and edible oils, with optional food-grade materials available. Its gentle pumping action preserves product integrity, while easy disassembly simplifies sanitation and cleaning cycles.
Paint & Coating Manufacturing:
Widely used in transferring and metering paints, inks, resins, and adhesives that demand precise, consistent flow rates. The pump’s low shear design prevents material degradation and maintains uniform viscosity during handling.
Cosmetics & Personal Care:
Ideal for moving creams, lotions, gels, and thick emulsions, offering a space-efficient and hygienic solution that prevents aeration and maintains the quality of sensitive formulations.
General Industrial & Lubrication:
Frequently employed for circulating and transferring heavy oils, greases, and lubricants in machinery, hydraulic systems, and production lines, where the NCB3’s robust construction and tolerance for fluid contamination ensure long service life.

Factory&FAQ

Packaging & Delivery

NCB3 pumps are typically packaged securely to prevent damage during transit. The packaging includes:

Protective Wrapping: To safeguard the pump from environmental damage.

Custom Crates: For larger, heavier pumps, ensuring safe handling.

Documentation: Includes installation, maintenance instructions, and warranty details.

Delivery time depends on the model, customizations, and location but typically ranges from 2 to 6 weeks from the order date.

NCB3 Gear Pump FAQ:

1. What are NCB3 series gear pumps?

The NCB3 is a reliable, fixed-displacement internal crescent gear pump, designed as a core component for industrial fluid transfer systems. Featuring a compact cast iron construction, it is specifically engineered for high-viscosity fluid handling that requires consistent flow, low pulsation, and long service life, making it ideal for chemical, food, and coating applications.

2. What makes the NCB3 different from standard aluminum gear pumps?

The NCB3 is built for smooth, high-viscosity fluid transfer where standard pumps may struggle:

Internal Gear & Crescent Design: Unlike external gear pumps that can trap fluid and cause pulsation, the NCB3’s internal meshing with a crescent plate eliminates dead zones, ensuring quieter, low-pulsation flow and reduced wear.
Superior Viscosity Handling: It excels at transferring high-viscosity media (up to 100,000 cP), such as heavy oils, syrups, and paints, which would cause cavitation or flow loss in standard pumps.
Gentle Fluid Handling: The low-shear pumping action prevents aeration and degradation of sensitive fluids, preserving product quality in food, cosmetic, and coating applications.

3. What is the working pressure range of NCB3 pumps?

The NCB3 is a compact, low-to-medium pressure specialist. Depending on the specific model and displacement, the series typically handles:

Continuous Operating Pressure: Up to 10 bar (145 PSI).
Maximum Peak Pressure: Up to 12 bar (174 PSI).

This pressure rating makes the NCB3 ideal for process transfer, metering, and lubrication systems in general industrial environments.

4. Can NCB3 pumps replace other brands?

Yes, the NCB3 is a high-quality, cost-effective alternative to other premium internal gear pumps. It is often used as a replacement or upgrade for:

Viking® SG Series pumps.
Tuthill® 3000 Series pumps.
Zenith® Process pumps (for light-duty transfer applications).

To ensure a successful swap, verify the Mounting Configuration, Port Size, and Flow/Displacement Rating to match your existing system.

5. What fluids are suitable for NCB3 gear pumps？

To protect the pump’s gears, seals, and cast iron body, the following is recommended:

Fluid Type: Clean, non-abrasive fluids including oils, greases, solvents, paints, resins, and food-grade syrups. Abrasive or corrosive media require special material upgrades.
Viscosity Range: 0.2 to 100,000 cP. Optimal efficiency is achieved between 50–5,000 cP.
Temperature Range: Standard models handle -10°C to +120°C (14°F to 248°F). High-temperature seal options are available for extreme conditions.

6. What is the typical speed range of NCB3 pumps?

The NCB3’s speed is closely tied to the fluid viscosity. The typical operating range is:

Recommended Speed: 300–960 RPM.
For High Viscosity Fluids (>10,000 cP): Lower speeds (300–600 RPM) are recommended to prevent excessive shear and wear.
For Light Oils or Solvents: Speeds up to 960 RPM can be used for higher flow rates.

7. Do you provide OEM or customized services?

Yes, we support OEM and customization, including nameplate, packaging, and specific performance requirements. Send us your drawings or specifications for evaluation.

8. How can I get a quotation quickly

Please provide the following details:

Model or displacement
Working pressure
Speed
Quantity
We will reply within 12 hours with a competitive quotation.

Certifications & Quality Assurance

NCB3 pumps are manufactured in compliance with international standards, ensuring high performance and reliability:

ISO 9001: Certified for quality management systems.

CE Certification: Ensures compliance with European safety, health, and environmental protection standards.

RoHS Compliance: Ensures the pump does not contain hazardous materials.

Factory Testing: Every pump is rigorously tested for performance, pressure, and leak integrity before shipping.

FAQ

1.What's our advantages?

Factory established in 2005;

With a great deal of production experience;

80+ employees become the professional team;

Constant updated ERP system ensure efficiency of work;

Sophisticated equipment ehanced the accuracy of products;

Professional salesmen provide the greast service;

With a large number of famous customers all over the world;

Great after-sales service;

With the long term cooperation with famous logistics and express company in China,provide the better goods service.

2.What is your payment terms?

Small order/sample order,full payment in advance; Big orders send the first payment 30% before the production,and the balance before shippment.We'll show the photos of the products and packages before delivery.

3.Can you make my own brand on the products?

Of course we can. Just send me your logo we can make it for you.

4.What is our main export market?

America(40.5%):USA, Canada, Argentina, Brazil

Europe(30.8%):Italy,Germany,England,Holland,Spain,Swiss,Finland,Russia,Poland.

Asia(23.5%):Korea,singapore,India,Turkey,Vietnam,Saudi Arabia,Syria, Israel,Lebanon.

Others(5.8%).

Unedited footage of the Green Hydraulic Factory

The Green hydraulic pump manufacturing facility is a specialized industrial plant that focuses on producing hydraulic pumps and related components. These factories are equipped with advanced machinery and technology to fabricate high-quality pumps designed for a wide range of applications, from heavy equipment and machinery to automotive and industrial systems.

The production process typically involves precision engineering, where raw materials like metals and alloys are processed into pump components such as gears, pistons, cylinders, and seals. These parts are then assembled into fully functional hydraulic pumps, which are tested for performance and quality control to ensure reliability, efficiency, and durability under various working conditions.

Green Hydraulic's manufacturing facilities for hydraulic pumps maintain stringent quality standards, often adhering to international certifications, to meet the expectations of customers in industries such as construction, agriculture, automotive, and manufacturing.

Unedited footage of the Green Hydraulic Factory3

All hydraulic pumps produced by Green Hydraulic have undergone compliance testing, ensuring their quality and reliability.

Unedited footage of the Green Hydraulic Factory4

To meet the diverse needs of different industries, the green hydraulic offer customization options, such as specialized seals, materials, and pump configurations. These facilities often work closely with engineering teams to develop tailored solutions for specific applications, from high-pressure systems to low-flow, high-efficiency pumps.

Unedited footage of the Green Hydraulic Factory5

Each pump undergoes a rigorous quality control process, where pressure tests and performance assessments are conducted to ensure that the pumps meet the required standards for flow rate, pressure capacity, and durability.